Multi-Year Signing Requirement Checker
Each tax year is its own return with its own Form T183CORP. Enter the number of years to see what that produces.
Written and reviewed by Sharad Gondaliya, CPA (Ontario), CPA Ontario Membership 61040184.
Last reviewed: November 4, 2026
Enter how many tax years are being filed.
Gondaliya CPA Professional Corporation is a registered EFILE electronic filer. Returns are prepared and transmitted in Canada. Credentials are never shared and never used offshore.
Why Each Year Needs Its Own Signature
Form T183CORP authorises the transmission of one return. It carries the figures on that return, so a form signed for one tax year cannot authorise another: the figures on it would be the wrong ones.
That is why a run of six quiet years is six signatures rather than one. The work is prepared together, and the authorisations stay separate.
What a Run of Years Produces
| Per tax year | One each | Why |
|---|---|---|
| A T2 return | Yes | Each tax year is a separate return |
| A Form T183CORP | Yes | It carries that year’s own figures |
| A transmission | Yes | One return goes per transmission |
| A CRA confirmation | Yes | Each accepted return is acknowledged on its own |
| A six-year retention period | Yes | It runs from the day that year was transmitted |
| The fee | Yes | Counted per tax year, not per sitting |
The unfiled years cost calculator prices a run at the fee per year.
The Years Are Filed Oldest First
A run is filed from the oldest year forward, so that opening balances and loss continuity carry correctly from one year into the next. A schedule cannot follow a year that is missing.
The signing follows the same order, which is why the forms arrive as a sequence rather than all at once.
Frequently Asked Questions
Do I sign once for all my years?
No. One Form T183CORP is signed for each tax year, because each form carries that year’s own figures.
Do I get one confirmation or several?
One for each accepted return. Six years filed together produce six confirmations.
Does filing several years at once change the fee?
No. The fee is $300.00 plus HST per tax year, counted per year however many are filed together.
Nil T2 Filing, $300.00 plus HST per tax year
Type your corporation name, pick your unfiled years, pay, and sign Form T183CORP on a secure screen. Your CRA confirmation is emailed within 3 business days.
Start Nil T2 Filing NOW